package string;

public class StringStringBuilderDemo {
    public static void main(String[] args) {
        /*
        String s="a";
        for(int i=0;i<10000000;i++){
            s=s+i;
        }
        System.out.println("执行完毕");

         */

        StringBuilder s=new StringBuilder("a");
        for (int i=0;i<100;i++){
            s.append(i);
        }
        System.out.println("执行完毕");







    }
}
